You may consider multiplying that by a factor to add some conservatism (though my estimates themselves may actually be conservative given that a lot of mining happens in country with low energy and labour prices), but it still seems like it's more profitable to keep the ASICs running than to switch them off, which is attested to by the fact the hashrate hasn't been significantly affected by the recent fluctuations in price.
https://www.eia.gov/electricity/monthly/epm_table_grapher.ph...